sbicvar.h revision 1.14
1 /* $NetBSD: sbicvar.h,v 1.14 1998/11/19 21:44:37 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1990 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Van Jacobson of Lawrence Berkeley Laboratory. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)scsivar.h 7.1 (Berkeley) 5/8/90 39 */ 40 #ifndef _SBICVAR_H_ 41 #define _SBICVAR_H_ 42 #include <sys/malloc.h> 43 44 /* 45 * The largest single request will be MAXPHYS bytes which will require 46 * at most MAXPHYS/NBPG+1 chain elements to describe, i.e. if none of 47 * the buffer pages are physically contiguous (MAXPHYS/NBPG) and the 48 * buffer is not page aligned (+1). 49 */ 50 #define DMAMAXIO (MAXPHYS/NBPG+1) 51 52 struct dma_chain { 53 int dc_count; 54 char *dc_addr; 55 }; 56 57 /* 58 * ACB. Holds additional information for each SCSI command Comments: We 59 * need a separate scsi command block because we may need to overwrite it 60 * with a request sense command. Basicly, we refrain from fiddling with 61 * the scsipi_xfer struct (except do the expected updating of return values). 62 * We'll generally update: xs->{flags,resid,error,sense,status} and 63 * occasionally xs->retries. 64 */ 65 struct sbic_acb { 66 TAILQ_ENTRY(sbic_acb) chain; 67 struct scsipi_xfer *xs; /* SCSI xfer ctrl block from above */ 68 int flags; /* Status */ 69 #define ACB_FREE 0x00 70 #define ACB_ACTIVE 0x01 71 #define ACB_DONE 0x04 72 #define ACB_CHKSENSE 0x08 73 #define ACB_BBUF 0x10 /* DMA input needs to be copied from bounce */ 74 #define ACB_DATAIN 0x20 /* DMA direction flag */ 75 struct scsi_generic cmd; /* SCSI command block */ 76 int clen; 77 struct dma_chain sc_kv; /* Virtual address of whole DMA */ 78 struct dma_chain sc_pa; /* Physical address of DMA segment */ 79 u_long sc_tcnt; /* number of bytes for this DMA */ 80 u_char *sc_dmausrbuf; /* user buffer kva - for bounce copy */ 81 u_long sc_dmausrlen; /* length of bounce copy */ 82 u_short sc_dmacmd; /* Internal data for this DMA */ 83 char *pa_addr; /* XXXX initial phys addr */ 84 u_char *sc_usrbufpa; /* user buffer phys addr */ 85 }; 86 87 /* 88 * Some info about each (possible) target on the SCSI bus. This should 89 * probably have been a "per target+lunit" structure, but we'll leave it at 90 * this for now. Is there a way to reliably hook it up to sc->fordriver?? 91 */ 92 struct sbic_tinfo { 93 int cmds; /* #commands processed */ 94 int dconns; /* #disconnects */ 95 int touts; /* #timeouts */ 96 int perrs; /* #parity errors */ 97 int senses; /* #request sense commands sent */ 98 u_char* bounce; /* Bounce buffer for this device */ 99 ushort lubusy; /* What local units/subr. are busy? */ 100 u_char flags; 101 u_char period; /* Period suggestion */ 102 u_char offset; /* Offset suggestion */ 103 } tinfo_t; 104 105 struct sbic_softc { 106 struct device sc_dev; 107 struct isr sc_isr; 108 struct target_sync { 109 u_char state; 110 u_char period; 111 u_char offset; 112 } sc_sync[8]; 113 u_char target; /* Currently active target */ 114 u_char lun; 115 struct scsipi_link sc_link; /* proto for sub devices */ 116 struct scsipi_adapter sc_adapter; 117 sbic_regmap_t sc_sbic; /* the two SBIC pointers */ 118 volatile void *sc_cregs; /* driver specific regs */ 119 120 /* Lists of command blocks */ 121 TAILQ_HEAD(acb_list, sbic_acb) free_list, 122 ready_list, 123 nexus_list; 124 125 struct sbic_acb *sc_nexus; /* current command */ 126 struct sbic_acb sc_acb[8]; /* the real command blocks */ 127 struct sbic_tinfo sc_tinfo[8]; 128 129 struct scsipi_xfer *sc_xs; /* transfer from high level code */ 130 u_char sc_flags; 131 u_char sc_scsiaddr; 132 u_char sc_stat[2]; 133 u_char sc_msg[7]; 134 u_long sc_clkfreq; 135 u_long sc_tcnt; /* number of bytes transfered */ 136 u_short sc_dmacmd; /* used by dma drivers */ 137 u_short sc_dmatimo; /* dma timeout */ 138 u_long sc_dmamask; /* dma valid mem mask */ 139 struct dma_chain *sc_cur; 140 struct dma_chain *sc_last; 141 int (*sc_dmago) __P((struct sbic_softc *, char *, int, int)); 142 int (*sc_dmanext) __P((struct sbic_softc *)); 143 void (*sc_enintr) __P((struct sbic_softc *)); 144 void (*sc_dmastop) __P((struct sbic_softc *)); 145 u_short gtsc_bankmask; /* GVP specific bank selected */ 146 }; 147 148 /* sc_flags */ 149 #define SBICF_ALIVE 0x01 /* controller initialized */ 150 #define SBICF_DCFLUSH 0x02 /* need flush for overlap after dma finishes */ 151 #define SBICF_SELECTED 0x04 /* bus is in selected state. */ 152 #define SBICF_ICMD 0x08 /* Immediate command in execution */ 153 #define SBICF_BADDMA 0x10 /* controller can only DMA to ztwobus space */ 154 #define SBICF_INTR 0x40 /* SBICF interrupt expected */ 155 #define SBICF_INDMA 0x80 /* not used yet, DMA I/O in progress */ 156 157 /* sync states */ 158 #define SYNC_START 0 /* no sync handshake started */ 159 #define SYNC_SENT 1 /* we sent sync request, no answer yet */ 160 #define SYNC_DONE 2 /* target accepted our (or inferior) settings, 161 or it rejected the request and we stay async */ 162 #ifdef DEBUG 163 #define DDB_FOLLOW 0x04 164 #define DDB_IO 0x08 165 #endif 166 extern u_char sbic_inhibit_sync[8]; 167 extern int sbic_no_dma; 168 extern int sbic_clock_override; 169 170 #define PHASE 0x07 /* mask for psns/pctl phase */ 171 #define DATA_OUT_PHASE 0x00 172 #define DATA_IN_PHASE 0x01 173 #define CMD_PHASE 0x02 174 #define STATUS_PHASE 0x03 175 #define BUS_FREE_PHASE 0x04 176 #define ARB_SEL_PHASE 0x05 /* Fuji chip combines arbitration with sel. */ 177 #define MESG_OUT_PHASE 0x06 178 #define MESG_IN_PHASE 0x07 179 180 #define MSG_CMD_COMPLETE 0x00 181 #define MSG_EXT_MESSAGE 0x01 182 #define MSG_SAVE_DATA_PTR 0x02 183 #define MSG_RESTORE_PTR 0x03 184 #define MSG_DISCONNECT 0x04 185 #define MSG_INIT_DETECT_ERROR 0x05 186 #define MSG_ABORT 0x06 187 #define MSG_REJECT 0x07 188 #define MSG_NOOP 0x08 189 #define MSG_PARITY_ERROR 0x09 190 #define MSG_BUS_DEVICE_RESET 0x0C 191 #define MSG_IDENTIFY 0x80 192 #define MSG_IDENTIFY_DR 0xc0 /* (disconnect/reconnect allowed) */ 193 #define MSG_SYNC_REQ 0x01 194 195 #define MSG_ISIDENTIFY(x) (x&MSG_IDENTIFY) 196 #define IFY_TRN 0x20 197 #define IFY_LUNTRN(x) (x&0x07) 198 #define IFY_LUN(x) (!(x&0x20)) 199 200 /* Check if high bit set */ 201 202 #define STS_CHECKCOND 0x02 /* Check Condition (ie., read sense) */ 203 #define STS_CONDMET 0x04 /* Condition Met (ie., search worked) */ 204 #define STS_BUSY 0x08 205 #define STS_INTERMED 0x10 /* Intermediate status sent */ 206 #define STS_EXT 0x80 /* Extended status valid */ 207 208 209 /* States returned by our state machine */ 210 211 #define SBIC_STATE_ERROR -1 212 #define SBIC_STATE_DONE 0 213 #define SBIC_STATE_RUNNING 1 214 #define SBIC_STATE_DISCONNECT 2 215 216 /* 217 * XXXX 218 */ 219 struct scsi_fmt_cdb { 220 int len; /* cdb length (in bytes) */ 221 u_char cdb[28]; /* cdb to use on next read/write */ 222 }; 223 224 struct buf; 225 struct scsipi_xfer; 226 227 void sbic_minphys __P((struct buf *bp)); 228 int sbic_scsicmd __P((struct scsipi_xfer *)); 229 void sbicinit __P((struct sbic_softc *)); 230 int sbicintr __P((struct sbic_softc *)); 231 #ifdef DEBUG 232 void sbic_dump __P((struct sbic_softc *dev)); 233 #endif 234 235 #endif /* _SBICVAR_H_ */ 236
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